is this GNAT error message confusing or am I confused or both?

[Georg Bauhaus]

Robert Dewar wrote:
> Richard Kenner wrote:

>> I'd reword it as
>>     selected component has invalid prefix "X"
>>
>> or
>>     "X" is an invalid prefix of a selected component
> 
> 
> that sounds like a reasonable suggestion. [...] it indeed may
> make things clearer

I for one find these messages easier to follow.

Maybe less clear but in line with the other "invalids"

    invalid prefix of a selected component: "X"

Or, if possible

    invalid prefix to selector: "X"